Bent Axis Variable Displacement Motors Series 51 and 51-1

Transcription

1 MKING MODERN LIVING POSSILE Technical Information ent xis Variable Displacement Motors Series 51 and 51-1 powersolutions.danfoss.com

2 Revision History Table of Revisions Date Changed Rev Jan 2014 Converted to Danfoss layout - DIT CMS Jun 2005 First version 2 520L0440 Rev Jan 2014

3 Contents General description Sectional view System circuit description Technical specifications Series 51-1, two-position control...7 Series 51, proportional control... 8 Pictorial diagram...9 System circuit diagram...9 General specifications Specific data...10 Fluid specifications...11 Determination of nominal motor sizes General technical specifications Case pressure...13 Speed range...13 Pressure limits Loop flushing...14 Minimum displacement limiter Hydraulic fluids Temperature and viscosity Fluid and filtration Independent braking system Reservoir...17 Motor bearing life External shaft loads External shaft load orientation...19 llowable external shaft load, when shaft load distance is different from standard...20 Efficiency graphs and maps Speed sensor Typical control and regulator applications Typical control and regulator applications...24 Controls circuit diagram nomenclature description Hydraulic two-position control option N1NN for 51-1 frame size 060, 080, Hydraulic two-position control N1NN Control pressure...25 Hydraulic two-position control option H1 for 51 frame size 160, Hydraulic two-position control H Control pressure...27 Pressure compensator control options T** for 51-1 frame size 060, 080, Pressure compensator control T** Pressure Compensator Configuration: TC with Hydraulic rake Pressure Defeat Pressure Compensator Configuration: TD1, TD2, TD7 with Electric rake Pressure Defeat...29 Solenoid Connectors Pressure Compensator Configuration: TC2 without rake Pressure Defeat Pressure Compensator Control Options T** for 51 Frame Size 160, Pressure Compensator Control T**...30 Pressure Compensator Configuration: TC0 with Hydraulic rake Pressure Defeat...31 Pressure Compensator Configuration: TC2 without rake Pressure Defeat Hydraulic Two-Position Control Options TH** for 51-1 Frame Size 060, 080, Hydraulic Two-Position Control TH**...32 Pressure Compensator Override (PCOR)...32 Pressure Compensator Configuration: THC with Hydraulic rake Pressure Defeat Pressure Compensator Configuration: THD1, THD2, THD7 with Electric rake Pressure Defeat Solenoid Connectors L0440 Rev Jan

4 Contents Pressure Compensator Configuration: THC2 without rake Pressure Defeat...33 Hydraulic Two-Position Control Options TH** for 51 Frame Size 160, Hydraulic Two-Position Control TH**...34 Pressure Compensator Override (PCOR)...34 Pressure Compensator Configuration: THC0 with Hydraulic rake Pressure Defeat...35 Pressure Compensator Configuration: THC2 without rake Pressure Defeat...35 Electrohydraulic Two-Position Control Options E11, E21, E71 for 51-1 Frame Size 060, 080, Electrohydraulic Two-Position Control...36 Options E11, E21, E Pilot Pressure for Solenoid Solenoid Connectors Electrohydraulic Two-Position Control Options E15, E25 for 51 Frame Size 160, Electrohydraulic Two-Position Control...38 Options E15, E Pilot Pressure for Solenoid Solenoid Connector...38 Electrohydraulic Two-Position Control Options F11, F21 for 51-1 Frame Size 060, 080, Electrohydraulic Two-Position Control...39 Options F11, F Pilot Pressure for Solenoid Solenoid Connector...40 Electrohydraulic Two-Position Control Options F15, F25 for 51 Frame Size 160, Electrohydraulic Two-Position Control...41 Options F15, F Pilot Pressure for Solenoid Solenoid Connector...41 Electrohydraulic Two-Position Control Options T1**, T2**, T7** for 51-1 Frame Size 060, 080, Electrohydraulic Two-Position Control T1**, T2**, T7** Pressure Compensator Override (PCOR)...42 Pressure Compensator Configuration: T*C with Hydraulic rake Pressure Defeat Pressure Compensator Configuration: T*D1, T*D2, T* D7 with Electric rake Pressure Defeat...43 Solenoid Connectors Pressure Compensator Configuration: T*C2 without rake Pressure Defeat Electrohydraulic Two-Position Control Options T1**, T2** for 51 Frame Size 160, Electrohydraulic Two-Position Control T1**, T2**...45 Pressure Compensator Override (PCOR)...45 Pressure Compensator Configuration: T*C0 with Hydraulic rake Pressure Defeat...45 Pressure Compensator Configuration: T*C2 without rake Pressure Defeat Solenoid Connector...46 Electrohydraulic Proportional Control Options EP**, EQ** for 51 Frame Size 060, 080, 110, 160, Electrohydraulic Proportional Control EP**, EQ** Control Supply Pressure (Port 1) Connectors...47 Pressure Compensator Override (PCOR)...48 Pressure Compensator Override Configuration: EP1, EQ1 with rake Pressure Defeat...48 Pressure Compensator Override Configuration: EP2, EQ2 without rake Pressure Defeat...48 Electrohydraulic Proportional Control Options L11, L21, L71 for 51 Frame Size 060, 080, 110, 160, Electrohydraulic Proportional Control L1**, L2**, L7**...49 Solenoid Connectors Electrohydraulic Proportional Control Options D7M1, D8M1 for 51 Frame Size 060, 080, 110, 160, Electrohydraulic Proportional Control D7M1, D8M Pressure Compensator Override (PCOR)...51 Pressure Compensator Configuration: D7M1, D8M1 with Hydraulic rake Pressure Defeat Solenoid Connector...52 Hydraulic Proportional Control Options HS** for 51 Frame Size 060, 080, 110, 160, Hydraulic Proportional Control HS** L0440 Rev Jan 2014

5 Contents Control Pressure (Port 1) Maximum allowable Control Pressure (Port 1)...53 Pressure Compensator Override (PCOR)...53 Pressure Compensator Override Configuration: HS1 with rake Pressure Defeat Pressure Compensator Override Configuration: HS2 without rake Pressure Defeat Hydraulic Proportional Control Option H1 for 51 Frame Size 060, 080, 110, 160, Hydraulic Proportional Control H Control Pressure (Port 1) Maximum allowable Control Pressure (Port 1)...55 General Dimensions Frame Size 060 SE Flange Design per ISO 3019/ DIN Flange Design per ISO 3019/ Cartridge Flange...63 General Dimensions Frame Size 080 SE Flange Design per ISO 3019/ DIN Flange Design per ISO 3019/ Cartridge Flange...72 General Dimensions Frame Size 110 SE Flange Design per ISO 3019/ DIN Flange Design per ISO 3019/ Cartridge Flange...81 General Dimensions Frame Size 160 SE Flange Design per ISO 3019/ DIN Flange Design per ISO 3019/ Cartridge Flange...88 General Dimensions Frame Size 250 SE Flange Design per ISO 3019/ Dimension Controls Pressure Compensator Control Options T** for 51-1 Frame Size Pressure Compensator Control Options T** for 51 Frame Size Hydraulic Two-Position Control Options TH** for 51-1 Frame Size Hydraulic Two-Position Control Options TH** for 51 Frame Size Electrohydraulic Two-Position Control Options E11, E21, E71, F11, F21 for 51-1 Frame Size Electrohydraulic Two-Position Control Options E15, E25, F15, F25 for 51 Frame Size Electrohydraulic Two-Position Control Options T1**, T2**, T7** for 51-1 Frame Size...95 Electrohydraulic Two-Position Control Options T1C2, T2C2 for 51 Frame Size...96 Electrohydraulic Proportional Control Options EP1, EQ1 for 51 Frame Size...97 Electrohydraulic Proportional Control Options L11, L21, L71 for 51 Frame Size...98 Electrohydraulic Proportional Control Options D7M1, D8M1 for 51 Frame Size Electrohydraulic Proportional Control Options D7M1, D8M1 for 51 Frame Size Hydraulic Proportional Control Options HS* for 51 Frame Size Hydraulic Proportional Control Option H1 for 51 Frame Size L0440 Rev Jan

6 General description Series 51 and 51-1 variable displacement motors are bent axis design units, incorporating spherical pistons. These motors are designed primarily to be combined with other products in closed circuit systems to transfer and control hydraulic power. Series 51 and 51-1 motors have a large maximum / minimum displacement ratio (5:1) and high output speed capabilities. SE, cartridge, and DIN flange configurations are available. complete family of controls and regulators is available to fulfill the requirements of a wide range of applications. Motors normally start at maximum displacement. This provides maximum starting torque for high acceleration. The controls may utilize internally supplied servo pressure. They may be overridden by a pressure compensator which functions when the motor is operating in motor and pump modes. defeat option is available to disable the pressure compensator override when the motor is running in pump mode. The pressure compensator option features a low pressure rise (short ramp) to ensure optimal power utilization throughout the entire displacement range of the motor. The pressure compensator is also available as a stand-alone regulator. The series 51 and 51-1 motors dvanced technology today The most technically advanced hydraulic units in the industry SE, cartridge, and DIN flange motors Cartridge motors designed for direct installation in compact planetary drives Large displacement ratio (5:1) Complete family of control systems Proven reliability and performance Optimum product configurations Compact, lightweight 6 520L0440 Rev Jan 2014

7 Sectional view Series 51-1, two-position control MINIMUM DISPLCEMENT LIMITER VLVE SEGMENT ERING PLTE SPEED PICKUP RING TPERED ROLLER ERINGS FLNGE SPEED SENSOR SNCHRONIING SHFT SERVO PISTON PISTON CHRGE PRESSURE RELIEF VLVE Name plate ELECTROHDRULIC TO-POSITION CONTROL P E Model code arcode serial number Model No./Ident. No. Model Code Serial No. Neumünster/Germany 51D110-1-RD4N E11 NNU2 DD Made in Germany N Ident number Serial number Place of manufacture P E L0440 Rev Jan

8 Sectional view Series 51, proportional control ELECTRIC PROPORTIONL CONTROL MINIMUM DISPLCEMENT LIMITER VLVE SEGMENT ERING PLTE SPEED PICKUP RING TPERED ROLLER ERINGS FLNGE PISTON SPEED SENSOR SNCHRONIING SHFT Name plate SERVO PISTON CHRGE PRESSURE RELIEF VLVE P E Model code arcode serial number Model No./Ident. No. Model Code Serial No. Neumünster/Germany 51V080 RS1N L11 31 D 051F0 D400 Made in Germany N Ident number Serial number Place of manufacture P E L0440 Rev Jan 2014

9 System circuit description Pictorial diagram Control Handle Displacement Control Valve Heat Exchanger ypass Valve Reservoir Orificed Check Valve Vacuum Gauge Reversible Variable Displacement Pump Servo Control Cylinder Heat Exchanger Multi-Function Valve Charge Pressure Relief Valve To Pump Case Loop Flushing Valve Hydraulic Two Position Control ent xis Variable Displacement Motor Output Shaft Servo Pressure Relief Valves Charge Pump Input Shaft Pump Swashplate Servo Control Cylinder Multi-Function Valve Loop Flushing Relief Valve To Motor Case Synchronizing Shaft orking Loop (High Pressure) orking Loop (Low Pressure) Suction Line System circuit diagram Control Fluid Case Drain Fluid P E M M1 M5 M3 L2 M3 N max. disp. n M1 T2 T3 M2 T1 T7 T8 M5 M2 S L2 L1 1 M7 SIGNL PRESSURE SUPPL bove schematics show the function of a hydrostatic transmission using a Series 90 xial Piston Variable Displacement Pump with manual displacement control (M) and a Series 51 ent xis Variable Displacement Motor with hydraulic two-position control (H). P E 520L0440 Rev Jan

10 Technical specifications General specifications Most specifications for bent axis variable displacement motors are listed on these pages. For definitions of the various specifications, see the related pages in this publication. Not all hardware options are available for all configurations; consult the series 51 and 51-1 model code supplement or price book for more information. General Specifications M otor type xial piston motor with variable displacement bent axis design. D irection of rotation Clockwise and counter-clockwise (bi-directional). I nstallation position Discretionary, the housing must always be filled with hydraulic fluid. O ther system requirements Independet braking system, circuit overpressure protection, suitable reservoir. Specific data Frame size Dimension Displacement maximum Vgma x cm [ in 3 ] [3.66] [4.92] [6.71] Displacement minimum Vgmin cm [ in 3 ] [0.73] [0.98] [1.34] Rated flow Q l/min [US gal/min] [57] [66] [81] Maximum flow Q ma l/min x [US gal/min] [70] [85] [105] Maximum corner power P corner k max. [hp] [450] [540] [660] eight (approx.) m kg [lb] [62] [71] [97] 2 Mass moment of inertia kgm J of the internal rotating parts [ lb ft 2 ] [0.1092] [0.1685] [0.3037] Type of mounting Four (4) bolt flange, SE or DIN-flange configuration. Two (2) bolt flange cartridge motor configuration. Pipe connections Main pressure ports: SE-flange. Remaining ports: SE straigt thread O-ring boss. Controls Displacement limiter Specific Data S haft configuration [9.82] 32.2 [1.96] 402 [106] 515 [136] 644 [864] 56 [123] [0.5553] [15.26] 50.0 [3.05] 550 [145] 675 [178] 850 [1140] 86 [190] [1.1580] N1, H, E1, E2, E7, F1, F2, T1, T2, T, TH, EP, EQ, L1, L2, L7, D7, D8, HS ll Series 51 motors incorporate mechanical minimum and maximum displacement limiters. Splined NSI or DIN shaft Case pressure bar [psi] Rated pressure 3 [44.0] Maximum pressure (cold start) 5 [73.0] Minimum pressure (at rated speed) 1 [14.5] System pressure range, input bar [psi] Maximum delta pressure 480 [7000] Minimum low pressure 10 [145] Maximum pressure 510 [7400] Speed Limits min 1 (rpm ) Frame size Rated speed at max. disp at min. disp ) M aximum speed at max. disp at min. disp Contact your Sauer-Danfoss representative for max. speed at displacements between ) 1 max. and min. displacement L0440 Rev Jan 2014

11 Technical specifications Frame size t maximum displacement t minimum displacement Nm/bar [lbf in/1000 psi] Nm/bar [lbf in/1000 psi] Fluid specifications Temperature range 1) Theoretical Torque 0.95 [583] 0.19 [117] 1.28 [784] 0.26 [156] C [ F] 1.75 [1067] 0.35 [214] 2.56 [1563] 0.51 [313] 3.98 [2428] 0.80 [486] Minimum -40 [-40] intermittent, cold start Rated 104 [220] Maximum 115 [240] intermittent 1) t the hottest point, normally the case drain port. Viscosity mm²/s [SUS] Minimum 7 [49] intermittent Recommanded operating range [70-370] Maximum 1600 [7500] intermittent cold start Cleanliness level and βx-ratio Required Fluid Cleanliness Level ISO 4406 Class Recommended βx-ratio for Suction Filtration β35-45 = 75 (β10 2) Recommended βx-ratio for Charge Pressure Filtration β15-20 = 75 (β10 10) Recommended Inlet Screen Size for Charge Pressure Filtration Determination of nominal motor sizes Vg n Vg n Metric system 100 µm-125 µm Inch system Input flow: l/min [US gal/min] Output torque: Nm [lbf-in] Output power: k [hp] Speed: min -1 min -1 (rpm) Vg = Motor displacement per rev. cm³ [in³] p = phd - pnd bar [psi] ηv = Motor volumetric efficiency 520L0440 Rev Jan

12 Technical specifications ηmh = Motor mechanical-hydraulic (Torque) efficiency ηt = Motor total (overall) efficiency phd = High pressure bar [psi] pnd = Low pressure bar [psi] L0440 Rev Jan 2014

13 General technical specifications Case pressure Under normal operating conditions, case pressure must not exceed the rated pressure. Momentary case pressure exceeding this rating is acceptable under cold start conditions, but still must stay below the maximum pressure rating. The minimum pressure provides proper lubrication at high speeds. Operation with case pressure in excess of these limits may result in external leakage due to damage to seals, gaskets, and/or housings. Case pressure Rated pressure 3 [44.0] Maximum pressure (cold start) 5 [73.0] Minimum pressure (at rated speed) 1 [14.5] Speed range Rated Speed is the speed limit recommended at full power condition and is the highest value at which normal life can be expected. Maximum Speed is the highest operating speed permitted and cannot be exceeded without reduction in the life of the product or risking immediate failure and loss of driveline power (which may create a safety hazard). In the range between rated and maximum speed please contact your Danfoss representative. arning The loss of hydrostatic drive line power in any mode of operation (e.g., forward, reverse, or neutral mode) may cause the loss of hydrostatic braking capacity. braking system, redundant to the hydrostatic transmission must, therefore, be provided which is adequate to stop and hold the system should the condition develop. Speed Limits min 1 (rpm ) Frame size Rated speed at max. disp at min. disp ) M aximum speed at max. disp at min. disp Contact your Sauer-Danfoss representative for max. speed at displacements between ) 1 max. and min. displacement. Speed limits bar [psi] max. speed at min. displacement rated speed at min. displacement Speed min -1 (rpm) For operation within this range contact Sauer-Danfoss representative. cceptable operating range Curve determined by rated flow max. speed at max. displacement rated speed at max. displacement Pressure limits min. displacement Motor angle (degrees) max. displacement P E System pressure is the dominant operating variable affecting hydraulic unit life. High pressure, which results from high load, reduces expected life in a manner similar to the affects of high load on other mechanical assemblies such as engines and gear boxes. There are load-to-life relationships for the rotating group and for the shaft anti-friction bearings. 520L0440 Rev Jan

14 General technical specifications Continuous pressure is the pressure at which the hydrostatic system could operate continuously and still achieve acceptable hydrostatic life. This pressure level varies depending on operating speed, and on the life requirements for a particular application. hile most mobile applications require system pressure to vary widely during operation, a weighted average pressure can be derived from a machine duty cycle. ( duty cycle is a means of quantifying the pressure and speed demands of a particular system on a percent time basis). Once a duty cycle has been determined or estimated for a specific application, contact your Danfoss representative for system life ratings for the application. Maximum delta pressure is the highest intermittent pressure allowed, and is the relief valve setting. It is determined by the maximum machine load demand. For most systems, the load should move at this pressure. Maximum pressure is assumed to occur a small percentage of operating time, usually less than 2 % of the total. oth the continuous and maximum pressure limits must be satisfied to achieve the expected life. Minimum low pressure must maintained under all operating conditions to avoid cavitation. System pressure range, input Maximum delta pressure 480 [7000] Minimum low pressure 10 [145] Maximum pressure 510 [7400] Loop flushing n integral non-adjustable loop flushing valve is incorporated into all these motors. Installations that require fluid to be removed from the low pressure side of the system circuit because of cooling requirements or contamination removal will benefit from loop flushing. The integral loop flushing valve is equipped with an orificed charge pressure relief valve designed with a cracking pressure of 16 bar [232 psi]. Valves are available with several orifice sizes to meet the flushing flow requirements of all system operating conditions. The total system charge pump flow should be of sufficient volume to accommodate: The number of motors in the system System efficiency under worst case conditions Pump control requirements External needs lthough charge pump sizing requires the consideration of many system variables, the following table gives a recommendation of what charge pump displacement may be required to accommodate the flushing flow of each available charge relief valve orifice. bar [psi] Loop flushing valve Charge pump size (cm 3 ) Recommanded Charge Pump Displacement E4 E6 F0 F3 G0 G3 H or , 47 or 65 arning arning: The loss of hydrostatic drive line power in any mode of operation (e.g., forward, reverse, or neutral mode) may cause the loss of hydrostatic braking capacity. braking system, redundant to the hydrostatic transmission must, therefore, be provided which is adequate to stop and hold the system should the condition develop L0440 Rev Jan 2014

15 General technical specifications Loop flushing shuttle spool Loop flushing relief valve P E P Low system pressure minus case pressure bar [psi] [508] 35 [363] 25 [218] 15 [73] [1.3] E4 E6 F0 F3 G0 G3 H0 10 [2.6] 15 [4.0] 20 [5.3] 25 [6.6] 30 [8.0] Case flow l/min [US gal/min] [9.2] [10.6] P E Equation: here: QFlush = flushing flow per motor QCharge = charge flow at operating speed kmo = number of motors feeded by one pump QLeak. = sum of external leakages including motor leakage pump leakage + internal consumers: 8 l/min [2.11 US gal/min] for displacement control pumps or for non-feedback controlled pumps at 200 bar [2900 psi] external consumers (e.g. brakes, cylinders, and other pumps) Minimum displacement limiter ll Series 51 and 51-1 motors incorporate mechanical displacement limiters. The minimum displacement of the motor is preset at the factory with a set screw in the motor housing. tamper-proof cap is provided. 520L0440 Rev Jan

16 General technical specifications Hydraulic fluids Ratings and data are based on operating with hydraulic fluids containing oxidation, rust and foam inhibitors. These fluids must possess good thermal and hydrolytic stability to prevent wear, erosion and corrosion of the internal components. Fire resistant fluids are also suitable at modified operating conditions. Please see Danfoss literature Hydraulic Fluids and Lubricants Technical Information for more information. It is not permissible to mix hydraulic fluids. For more information contact your Danfoss representative. Suitable Hydraulic fluids: Hydraulic fluids per DIN , part 2 (HLP) Hydraulic fluids per DIN , part 3 (HVLP) PI CD, CE and CF engine fluids per SE J183 M2C33F or G automatic transmission fluids (TF) gricultural multi purpose oil (STOU) Premium turbine oils (for Premium turbine oils contact your Danfoss representative). Temperature and viscosity Temperature and viscosity requirements must be concurrently satisfied. The data shown in the tables assume petroleum-based fluids, are used. The high temperature limits apply at the hottest point in the transmission, which is normally the motor case drain. The system should generally be run at or below the rated temperature. The maximum temperature is based on material properties and should never be exceeded. Cold oil will generally not affect the durability of the transmission components, but it may affect the ability to flow oil and transmit power; therefore temperatures should remain 16 C [30 F] above the pour point of the hydraulic fluid. The minimum temperature relates to the physical properties of component materials. For maximum unit efficiency and bearing life the fluid viscosity should remain in the recommended operating range. The minimum viscosity should be encountered only during brief occasions of maximum ambient temperature and severe duty cycle operation. The maximum viscosity should be encountered only at cold start. Heat exchangers should be sized to keep the fluid within these limits. Testing to verify that these temperature limits are not exceeded is recommended. Temperature range 1) C [ F] Minimum -40 [-40] intermittent, cold start Rated 104 [220] Maximum 115 [240] intermittent 1) t the hottest point, normally the case drain port. Viscosity mm²/s [SUS] Minimum 7 [49] intermittent Recommanded operating range [70-370] Maximum 1600 [7500] intermittent cold start L0440 Rev Jan 2014

17 General technical specifications Fluid and filtration To prevent premature wear, it is imperative that only clean fluid enter the hydrostatic transmission circuit. filter capable of controlling the fluid cleanliness to ISO 4406 Class 22/18/13 (SE J1165) or better under normal operating conditions is recommended. The filter may be located either on the inlet (suction filtration) or discharge (charge pressure filtration) side of the charge pump. The selected filtration system must maintain a cleanliness level of 22/18/13 per ISO The selection of a filter depends on a number of factors including the contaminant ingression rate, the generation of contaminants in the system, the required fluid cleanliness, and the desired maintenance interval. Filters are selected to meet the above requirements using rating parameters of efficiency and capacity. Filter efficiency may be measured with a eta ratio1) (β). For simple suction-filtered closed circuit transmissions and open circuit transmissions with return line filtration, a filter with a β-ratio within the range of β35-45 = 75 (β10 2) or better has been found to be satisfactory. For some open circuit systems, and closed circuits with cylinders being supplied from the same reservoir, a considerably higher filter efficiency is recommended. This also applies to systems with gears or clutches using a common reservoir. For these systems, a charge pressure or return filtration system with a filter β- ratio in the range of β15-20 = 75 (β10 10) or better is typically required. Since each system is unique, the filtration requirement for that system will be unique and must be determined by test in each case. It is essential that monitoring of prototypes and evaluation of components and performance throughout the test program be the final criteria for judging the adequacy of the filtration system. Please see Danfoss literature Hydraulic Fluids and Lubricants Technical Information for more information. 1) Filter βx-ratio is a measure of filter efficiency defined by ISO It is defined as the ratio of the number of particles greater than a given diameter ( x in µm) upstream of the filter to the number of these particles downstream of the filter. Cleanliness level and βx-ratio Required Fluid Cleanliness Level ISO 4406 Class Recommended βx-ratio for Suction Filtration β35-45 = 75 (β10 2) Recommended βx-ratio for Charge Pressure Filtration β15-20 = 75 (β10 10) Recommended Inlet Screen Size for Charge Pressure Filtration 100 µm-125 µm Independent braking system arning The loss of hydrostatic drive line power in any mode of operation (e.g., forward, reverse, or neutral mode) may cause the loss of hydrostatic braking capacity. braking system, redundant to the hydrostatic transmission must, therefore, be provided which is adequate to stop and hold the system should the condition develop. Reservoir The function of the reservoir is to remove air and to provide make up fluid for volume changes associated with fluid expansion or contraction, possible cylinder flow, and minor leakage. The reservoir should be designed to accommodate maximum volume changes during all system operating modes and to promote deaeration of the fluid as it passes through the tank. minimum reservoir volume equal to 1/2 to 1 1/2 times charge pump flow/min is suggested. This allows 30 seconds fluid dwell for removing entrained air at the maximum return flow. This is usually adequate to allow for a closed reservoir (no breather) in most applications. The reservoir outlet to the charge pump 520L0440 Rev Jan

18 General technical specifications inlet should be above the bottom of the reservoir to take advantage of gravity separation and prevent large foreign particles from entering the charge inlet line. The reservoir inlet (fluid return) should be positioned so that the flow to the reservoir is discharged below the normal fluid level, and also directed into the interior of the reservoir for maximum dwell and efficient deaeration. Motor bearing life The rated motor bearing life, Lh10, shown in the table below, is based on a 90 % survival rate of shaft bearings, when operating at a speed of n = 1500 min-1 (rpm) with a charge pressure of 20 bar [290 psi] and without external shaft load. Contact your Danfoss representative for bearing life values at other pressures and angles. Lifetimes for speeds other than 1500 min-1 (rpm) can be calculated from: L h10 - earing Life (hours) Effective delta pressure Frame size (D p) Motor angle ( ) b ar [ psi] [ 2030] [ 3050] [ 4060] [ 2030] [ 3050] [ 4060] [ 2030] [ 3050] [ 4060] [ 2030] [ 3050] [ 4060] [ 2030] [ 3050] [ 4060] External shaft loads Series 51 and 51-1 motors are designed with bearings that can accept external radial and thrust loads. The external radial shaft load limits are a function of the load position, the load orientation, and operating conditions of the unit L0440 Rev Jan 2014

19 General technical specifications External shaft load orientation SE-Flange design per ISO 3019/1 2 > 1 2 < 1 35 Fr OPTIMUM LOD ORIENTTION 35 1 Fr Fa DIN-Flange design per ISO 3019/2 2 > 1 2 < 1 35 Fr OPTIMUM LOD ORIENTTION 35 1 Fr Fa Cartridge Flange design Fr OPTIMUM LOD ORIENTTION 2 > 1 2 < Fr Fa P E The table below provides the following information: The maximum allowable radial load (Fr) based on the distance (x1) from the mounting flange to the load. The maximum allowable axial load (Fa). The actual distance of (Fr) for a given application from the mounting flangeto the load is (x2). is the basic distance. Fa/ p ratio of allowable axial load, dependent upon system pressure. The values in the table are maximum values, and are not allowed under continuous load conditions. 520L0440 Rev Jan

20 General technical specifications Frame size Maximum allowable radial load Distance from the SE-mounting flange Distance from the DIN-mounting flange Distance from the Cartridge design mounting flange asic distance Maximum allowable bending moment Maximum allowable axial load at zero rpm or running in the idle pressure Maximum allowable axial load at pressure = not available Radial and Thrust Loads to the Output Shaft Fr M Fa Fa/ Dp N [lbf ] mm mm mm mm Nm [lbf in] N [lbf ] N/bar [lbf/1000 psi] [2248] 33.6 [1.32] 57.2 [2.25] [4.63] 25.2 [0.99] 252 [2230] 1100 [247] 10.4 [161] [2698] 33.6 [1.32] 57.6 [2.27] [5.36] 25.6 [1.01] 307 [2717] 1400 [315] 12.6 [195] [3147] 62.7 [2.47] 94.7 [3.73] [7.00] 54.7 [2.15] 766 [6780] 1800 [405] 15.2 [236] [4047] 52.7 [2.07] 84.7 [3.33] [5845] 45.3 [1.78] 44.7 [1.76] 805 [7125] 2500 [562] 19.2 [298] 37.3 [1.47] 970 [8585] 4500 [1012] 26.4 [409] llowable external shaft load, when shaft load distance is different from standard Use this formula to calculate maximum allowable radial load when max. shaft load distance (2) is different from (1): (2) is the actual distance of (Fr) from the mounting flange to the load for a given application. If 2 < 1, (Fr) could also be calculated by the first equation, but in addition the bearing life has to be checked. Contact your Danfoss representative for load ratings of specific shafts or when the load orientation deviates more than 35 in either direction from the optimum. Metric system: Inch system: Metric or inch system: Efficiency graphs and maps This graph provides the volumetric and overall efficiencies for a typical Series 51 and 51-1 motor operating at maximum displacement, system pressures of 210 and 420 bar [3050 and 6090 psi], and a fluid viscosity of 8.2 mm²/s [53 SUS]. These efficiencies can be used for all frame sizes L0440 Rev Jan 2014

21 General technical specifications Overall efficiency and volumetric efficiency at maximum displacement volumetric e ficiency η v = 210 bar [3050 psi] η v = 420 bar [6090 psi] Efficiency % 90 η t = 420 bar [6090 psi] total efficiency η t = 210 bar [3050 psi] Speed % of rated speed P E This graph shows typical overall efficiencies for Series 51 and 51-1 motors operating at maximum displacement and system pressures up to 420 bar [6090 psi], and a fluid viscosity of 8.2 mm²/s [53 SUS]. These efficiencies can be used for all frame sizes. Overall efficiency at maximum displacement 420 [6090] System pressure bar [psi] 280 [4060] 140 [2030] % 93.5% 90.5% 84.5% 74.5% Speed% of rated speed P E This graph shows typical overall efficiencies for Series 51 and 51-1 motors operating at 30% of maximum displacement and system pressures up to 420 bar [6090 psi], and a fluidviscosity of 8.2 mm²/s (53 SUS). These efficiencies can be used for all frame sizes. Overall efficiency and volumetric efficiency at 30% of maximum displacement 100 Efficiency % volumetric efficiency η v = 210 bar [3050 psi] η v = 420 bar [6090 psi] overall efficiency η t = 210 bar [3050 psi] η t = 420 bar [6090 psi] Speed % of rated speed P E 520L0440 Rev Jan

22 General technical specifications This graph shows typical overall efficiencies for Series 51 and 51-1 motors operating at 30% of maximum displacement and system pressures up to 420 bar [6090 psi], and a fluidviscosity of 8.2 mm²/s (53 SUS). These efficiencies can be used for all frame sizes. Overall efficiency at 30% of maximum displacement System pressure bar [psi] 420 [6090] 280 [4060] 81% 80% 140 [2030] 77% 71% 61% Speed % of rated speed P E Speed sensor n optional speed sensor for direct measurement of speed is available. This sensor may also be used to sense the direction of rotation. special magnetic speed pick-up ring is pressed onto the outside diameter of the shaft and a Hall effect sensor is located in the motor housing. The sensor accepts supply voltage and outputs a digital pulse signal in response to the speed of the ring. The output changes its high/low state as the north and south poles of the permanently magnetized speed ring pass by the face of the sensor. The digital signal is generated at frequencies suitable for microprocessor based controls. The sensor is available with different connectors (see below). The SE and DIN flange motors use a flat end speed sensor. The cartridge flange motors use a conical end speed sensor. Contact your Danfoss representative for more information. Data Magnetic Speed Pick-up Ring Frame Size Pulse/Rev Connecting pin designation: Pin 1 or : Supply voltage Pin 2 or D : Direction of rotation Pin 3 or : Speed signal, digital Pin 4 or C : Gnd common Technical Data Speed Sensor 1) S upply voltage VD C Supply voltage regulated 15 VDC max. 2 m at 5 V Required current (no load) 0 m at 5 V Max. current and 1 Hz Max. frequency Voltage "high" Voltage "low" Temperatur range 1 DC 2 DC 15 khz Supply voltage Vmin. 0.5 VD C max. -40 to 110 C [-40 to 230 F] to energize the DC 12 V battery voltage; D C by a regulated power to energize the sensor contact your for an optional 1) It is not acceptable V speed sensor with it must be energized supply. If it is desirable with battery voltage, Sauer-Danfoss representative speed sensor L0440 Rev Jan 2014

23 General technical specifications Speed sensor with Turck Eurofast connector P Turck Eurofast Connector 4 pin (Supplied connector) IP Rating (DIN ) IP 67 Keyway (Ref) Mating connector straight No.: K14956 right angle No.: K Id.-No.: Id.-No.: P E 2 Speed sensor with Packard eather-pack connector 1 Red hite lack Green Packard eather-pack 4 pin (Supplied Connector) Mating Connector No.: K03379 Id.-No.: C D P E P E 520L0440 Rev Jan

24 Typical control and regulator applications Typical control and regulator applications The following table is provided to assist in selecting controls and regulators for various applications. These recommendations are based on experience with a wide range of applications. Contact your Danfoss representative for more information on control selection. M achine Functio n N1 H T E1/E2/E7 F1/F2 T1/T2 TH EP/EQ L1/L2/L7 D7/D8 HS C C C C C heel loader Propel m m m m m m m m m Roller compactor Propel m m m m Paver-heeled Propel m m m Paver-Tracked Propel m m m m m m Sweeper Propel m m m Trencher Propel m m m m Excavator-heeled Propel m m m Fork lift truck Propel m m gricultural machines Propel m m m m Forestry machines Propel m m m m m m m Telescopic handler Propel m m m m m Railroad machines Propel m m m m m Snow groomer Propel m m m m m Snow blower Propel m m m Crane inch m = Control without pressure compensator override = Control with pressure compensator override C = Control with pressure compensator override and defe m = Suitable configuration Control and Regulators L0440 Rev Jan 2014

25 Controls circuit diagram nomenclature description Hydraulic two-position control option N1NN for 51-1 frame size 060, 080, 110 Circuit Diagram Motor with Hydraulic Two-Position Control N1NN L2 N min. disp. n T3 T2 1 (M3) M5 L1 P E Ports:, = Main pressure lines L1, L2 = Drain lines = Gauge port servo pressure M5 = Gauge port servo supply pressure internal 1 (M3) = Control pressure port T2, T3, T3 = Optional orifices N = Speed sensor Hydraulic two-position control N1NN Displacement changes from maximum displacement to minimum displacement position, under load, as control pressure at port 1 (M3) is equal to low pressure or higher. Control pressure No pressure on port 1 (M3) = maximum displacement Control pressure on port 1 (M3) = minimum displacement. Max. control pressure 1(M3) = 50 bar [725 psi] The graph shows the necessary external and internal (= low system pressure) control pressure 1, which is needed to stroke the motor depending on high system pressure. 520L0440 Rev Jan

26 Controls circuit diagram nomenclature description Control N1NN necessary control pressure 30 [435] Servo pressure bar [psi] 20 [290] 10 [145] minimum servo pressure under all conditions [1450] [2900] [4350] System pressure bar [psi] 400 [5800] P E Control operation N1NN Control pressure min Displacement max P E Not all control options are shown in this Technical Information Contact your Danfoss representative for special control functions. Hydraulic two-position control option H1 for 51 frame size 160, 250 Circuit diagram motor with hydraulic two-position Control H1 L2 max. disp. M3 n N M1 T2 T3 T1 T7 T8 M5 M2 L1 1 M7 P E Ports:, = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for and M3, = Servo pressure port M5 = Gauge port servo supply pressure internal M7 = Gauge port control pressure L0440 Rev Jan 2014

27 Controls circuit diagram nomenclature description 1 = Control pressure port T1, T2, T3, = Optional orifices T7, T8 N = Speed sensor Hydraulic two-position control H1 Displacement can be changed hydraulically under load from minimum displacement to maximum displacement and vice versa by control pressure to port 1. Control pressure No pressure on port 1 = maximum displacement Control pressure on port 1 = minimum displacement. Max. control pressure 1 = 50 bar [725 psi] The standard control start point setting = 3 bar [44 psi] Control operation H1 min Displacement max 0 3 [44] Control pressure Δ bar [psi] P E Proportional control, option H1 see page 60. Not all control options are shown in this Technical Information contact your Danfoss representative for special control functions. Pressure compensator control options T** for 51-1 frame size 060, 080, 110 Circuit diagram motor with pressure compensator control T** L2 N min. disp. n T3 T3 T3 M3 with Electric brake pressure defeat M3 with Hydraulic brake pressure defeat M3 without rake pressure defeat L1 P E Ports:, = Main pressure lines T3 = Orifice 520L0440 Rev Jan

28 Controls circuit diagram nomenclature description L1, L2 = Drain lines N = Speed sensor M3, = Gauge port servo pressure, = Control pressure port brake pressure defeat Pressure compensator control T** Displacement is regulated automatically between minimum displacement and maximum displacement in response to system pressure. Regulator start = minimum displacement Regulator end = maximum displacement Regulator start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi]. Pressure ramp from regulator start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor. Control operation T** min Displacement max Ramp < 10 bar [145 psi] Regulator start Setting range 370 [5370] 130 [1890] System pressure Δ p bar [psi] P E Pressure Compensator Configuration: TC with Hydraulic rake Pressure Defeat shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, based on the following table. Rotation High pressure port Control pressure on port C C CC CC Differential control pressure between port / p m in = 0.5 bar [7 psi] p m ax = 50 bar [725 psi] Pressure Compensator Operation PCOR-Function yes no no yes Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls L0440 Rev Jan 2014

29 Controls circuit diagram nomenclature description Pressure Compensator Configuration: TD1, TD2, TD7 with Electric rake Pressure Defeat solenoid-switched valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. The solenoid valve must be controlled by an external electric signal, based on direction of motor rotation, based on the following table. Rotation C C Pressure Compensator Operation High pressure port Solenoid energize non energize energize non energize C d C d C d C d PCOR-Function yes no no yes Solenoid Connectors Magnet-Steckanschluss für DIN (angebauter Stecker) Gegenstecker Nr.: K09129 Id.-Nr.: P D MP Junior Timer Two Pin Connector (Supplied Connector) Mating Connector No.: K19815 Id.-No.: P E Configuration TD1 TD7 TD2 Voltage 2 V 1 DC 12 VD C 24 VD C Solenoid Data Electric power Connector 34 DIN MP Junior Timer two pin connector 34 DIN Pressure Compensator Configuration: TC2 without rake Pressure Defeat Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode. Pressure Compensator Options Configuration TC2 High pressure at port PCOR-Funktion and yes Not all control options are shown in this Technical Information Contact your Danfoss representative for special control functions. 520L0440 Rev Jan

30 Controls circuit diagram nomenclature description Pressure Compensator Control Options T** for 51 Frame Size 160, 250 Circuit Diagram Motor with Pressure Compensator Control T** L2 M3 N 4 4 M1 max. disp. n T2 T3 T1 T7 T8 (3) M5 with rake pressure defeat without rake pressure defeat L1 M2 P E Ports:, = Main pressure lines, = Control pressure ports, L1, L2 = Drain lines brake pressure defeat M1, M2 = Gauge port for and 4 = Gauge port pressure compensator M3, = Gauge port servo pressure T1, T2, T3, = Optional orifices M5 (3) = Gauge port servo supply T7, T8 N = Speed sensor Pressure Compensator Control T** Displacement is regulated automatically between minimum displacement and maximum displacement in response to system pressure. Regulator start = minimum displacement Regulator end = maximum displacement Regulator start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi]. Pressure ramp from regulator start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor. Control Operation T** min Displacement max Ramp < 10 bar [145 psi] Regulator start Setting range 370 [5370] 130 [1890] System pressure Δ p bar [psi] P E L0440 Rev Jan 2014

31 Controls circuit diagram nomenclature description Pressure Compensator Configuration: TC0 with Hydraulic rake Pressure Defeat shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, based on the following table. Rotation High pressure port Control pressure on port C C CC CC Differential control pressure between port / p m in = 0.5 bar [7 psi] p m ax = 50 bar [725 psi] Pressure Compensator Operation PCOR-Function no yes yes no Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls. Pressure Compensator Configuration: TC2 without rake Pressure Defeat Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode. Pressure Compensator Options Configuration TC2 High pressure at port PCOR-Funktion and yes Not all control options are shown in this Technical Information Contact your Danfoss representative for special control functions. Hydraulic Two-Position Control Options TH** for 51-1 Frame Size 060, 080, 110 Circuit Diagram Motor with Two-Position Control TH** L2 N n min. disp. T3 T3 T3 1 M3 with Electric brake pressure defeat 1 M3 with Hydraulic brake pressure defeat 1 M3 without rake pressure defeat L1 P E Ports:, = Main pressure lines, = Control pressure ports L1, L2 = Drain lines brake pressure defeat M3, = Gauge port servo pressure T3 = Orifice 1 = Control pressure port, N = Speed sensor hydr. override to max. angle 520L0440 Rev Jan

32 Controls circuit diagram nomenclature description Hydraulic Two-Position Control TH** Displacement can be changed hydraulically under load from minimum displacement to maximum displacement and vice versa. Pressure on port 1 must be equal to the pressure of the motor case ± 0.2 bar, [3.0 psi] this keeps the motor at minimum displacement. Pressure 10 bar, [145 psi] to 35 bar, [510 psi] above case pressure on port 1 strokes the motor to maximum displacement. Pressure Compensator Override (PCOR) The control can be overridden by PCOR using high loop pressure. hen the PCOR activates, the motor displacement increases toward maximum. Pressure ramp from PCOR start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor. PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi]. Control Operation TH** Pressure compensator override bar, [psi] Hydraulic two-positioncontrol 370 [5370] PCOR start setting range [145 psi] min. 10 bar 130 [1890] [510 psi] max. 35 bar min. max. Displacement Ramp < 10 [145] P E Pressure Compensator Configuration: THC with Hydraulic rake Pressure Defeat shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, based on the following table. Rotation High pressure port Control pressure on port C C CC CC Differential control pressure between port / p m in = 0.5 bar [7 psi] p m ax = 50 bar [725 psi] Pressure Compensator Operation PCOR-Function yes no no yes Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls L0440 Rev Jan 2014

33 Controls circuit diagram nomenclature description Pressure Compensator Configuration: THD1, THD2, THD7 with Electric rake Pressure Defeat solenoid-switched valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. The solenoid valve must be controlled by an external electric signal, based on direction of motor rotation, based on the following table. Rotation C C Pressure Compensator Operation High pressure port Solenoid energize non energize energize non energize C d C d C d C d PCOR-Function yes no no yes Solenoid Connectors Magnet-Steckanschluss für DIN (angebauter Stecker) Gegenstecker Nr.: K09129 Id.-Nr.: P D MP Junior Timer Two Pin Connector (Supplied Connector) Mating Connector No.: K19815 Id.-No.: P E Configuration THD1 THD7 THD2 Voltage 2 V 1 DC 12 VDC 24 VDC Solenoid Data Electric power Connector 34 DIN MP Junior Timer two pin connector 34 DIN Pressure Compensator Configuration: THC2 without rake Pressure Defeat Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode. Pressure Compensator Options Configuration THC2 High pressure at port PCOR-Funktion and yes Not all control options are shown in this Technical Information Contact your Danfoss representative for special control functions. 520L0440 Rev Jan